Here we present an innovative design of microstrip antennas for wide-band mobile communications. In order to obtain reduced back-radiation, while keeping the overall antenna dimensions suitably compact for practical terminals, the proposed radiators are backed by a reactive ground plane, constituted of a suitably designed pattern of metallic patches. Moreover, the operative bandwidth is increased with the use of a proximity coupling feed and the choice of a polygonal patch shape. Some numerical results are reported, obtained through a rigorous Method of Moment numerical tool, to show the effective improvement that this design may offer in the antenna performance for UMTS mobile communication systems.
Bilotti, F., Manzini, M., Alù, A., Vegni, L. (2006). Polygonal patch antennas with reactive impedance surfaces. JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, 20, 169-182 [10.1163/156939306775777260].